Mathematics · Properties of Triangles

If the angle bisector of angle A of triangle ABC meets its circumcircle at E and the opposite side BC at D, then the value of DE cos(A2) is equal to:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

12aa + b + c
2ab + c✓
3b2c + a
4a22(b + c)

Correct answer

ab + c

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If the angle bisector of angle A of triangle ABC meets its circumcircle at E and the opposite side BC at D, then the value of DE cos(A2) is equal to:

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If the angle bisector of angle A of triangle ABC meets its circumcircle at E and the opposite side BC at D, then the value of DE cos(A2) is equal to:

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